Casey, Illinois Climate

United States

Pop. 2,709 Elev. 199 m / 653 ft TZ: America/Chicago (UTC-5) ·

Casey has warm summers with average highs of 88°F (31°C) in July, and frigid winters averaging 18°F (-8°C) in January. Humidity pushes the summer feels-like temperature to 103°F (39°C), while wind chill can drive winter lows to 11°F (-12°C). Rain falls on about 58 days per year (37.9 in / 961 mm total), with snow on 7 days and 29 in (738 mm) of annual accumulation. The city averages 129 sunny days per year and around 36 thunderstorm days.

Temperature 88°F (31°C) high 18°F (-8°C) low
Feels like 103°F (39°C) high 11°F (-12°C) low
Rain 58 days 37.9 in (961 mm) /yr
Snow 7 days 29.1 in (738 mm) /yr
Sky 129 sunny 36 stormy
Wind 2.4 mph (1.1 m/s) avg

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Monthly Climate Chart

↓ Monthly data table
Best months to visit: Mar, May, Aug, Sep, Oct

Sky & Air by Month

Cloud cover (%)
50
Jan
62
Feb
54
Mar
64
Apr
64
May
59
Jun
59
Jul
43
Aug
32
Sep
43
Oct
53
Nov
66
Dec
Humidity (%)
70
Jan
67
Feb
56
Mar
62
Apr
64
May
69
Jun
76
Jul
69
Aug
62
Sep
66
Oct
69
Nov
76
Dec

Weather Days by Month

↓ Weather days table

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Nearby Cities

Nearby

Commercial airport 53 mi University of Illinois Willard Airport (CMI)
Ski resort 172 mi
National park 41 mi Shakamak State Park
Mountain peak (4,938 ft) 346 mi Gregory Bald
Hospital 20 mi Sarah Bush Lincoln Health Center
Hiking trail 41 mi Trail 1

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 33°F 1°C 18°F -8°C 0.9 in 22 mm 10.9 in276 mm 14
February 42°F 6°C 26°F -3°C 1.6 in 39 mm 5.3 in133 mm 9
March 63°F 17°C 40°F 5°C 4.0 in 101 mm 0.8 in20 mm 11
April 68°F 20°C 48°F 9°C 6.3 in 161 mm 5
May 73°F 23°C 56°F 13°C 4.1 in 104 mm 6
June 84°F 29°C 69°F 21°C 5.3 in 134 mm 8
July 88°F 31°C 73°F 23°C 6.2 in 158 mm 9
August 83°F 29°C 65°F 18°C 0.9 in 22 mm 16
September 82°F 28°C 58°F 14°C 2.1 in 53 mm 18
October 70°F 21°C 50°F 10°C 2.8 in 70 mm 18
November 54°F 12°C 38°F 3°C 2.8 in 71 mm 4.7 in119 mm 10
December 42°F 6°C 27°F -3°C 1.0 in 25 mm 7.4 in189 mm 5

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 14 0
February 9 2
March 11 4
April 5 5
May 6 4
June 8 6
July 9 7
August 16 2
September 18 2
October 18 2
November 10 2
December 5 0